Allen m



(No Model.)

A M WALKER Shutter Fastener.

No. 232,789. Patented Sept. 28,1880.

1271 I f I I "0 vi/Zrng.

UNITED STATES ALLEN M. WALKER, OF BUTLER, GEORGIA.

SHUTTER-FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 232,789, datedSeptember 28, 1880. Application filed June 1'7, 1880. (No model.)

To all whom it may concern:

Be it known that I, ALLEN M. WALKER, a citizen of the United States,resident at Butler, in the county of Taylor and State of Georgia, haveinvented certain new and useful Improvements in Window-l3liud Fasteners;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters or figures of referencemarked thereon, which form apart of this specification.

This invention relates to an improved lock for window-blinds, shutters,doors, and other purposes, in which the blind, shutter, or door issecured by means of a transverse or diagonal rod or bar on the outsidewhich is locked on the inside.

The object of my invention is to dispense with the screw-bolts and nutsor the keys or other devices usually employed for securing the bar, andto provide an automatic device by which the bolt may be secured by thesimple act of inserting it from the outside, as more fully hereinafterspecified, and thus obviate the trouble and inconvenience necessary insecuring the bar by the ordinary fastenings. These objects I attain bythe mechanism illustrated in the accompanying drawings, in which- Figure1 represents a perspective view of my improved lock, and Fig. 2 avertical sectional view of the same.

The letter A indicates a supporting-plate, constructed ofmetal or othersuitable material, carrying the various working parts of the device. Thesaid plate is provided with countersunk apertures B, for the insertionof screws, by means of which it may be secured to the inside of thewindow-blind. The said plate is also provided withan aperture, 0, forthe insertion of the bolt by means of which the bar is secured in place.

The letter D indicates two levers pivoted at the points E to thesupporting-plate. The upper parts of said levers bear against each otherwhen in a normal position, and are held in and returned to such positionby means of the flat springs F, secured to the studs or screws G, andheld against the respective levers by means of the pins H, secured tothe supporting-plate. The lower ends of said levers diverge and extendbelow the lower edge of the supporting-plate, forming bearings by whichthe levers may be operated to release the bolt.

The contiguous faces of the lovers are formed with semicircular recessesH, which form a circular aperture when the levers are closed together,in which the reduced portion I of the bolt K sets, and by which the boltis held when in place. The said boltis provided with a head, L, at oneend, the other end being conical in shape, so as to automaticallyseparate the levers when inserted.

The letter M indicates a transverse guide secured to thesupporting-plate across the levers, in order to hold the same closely upto the face of the plate irrespective of the fulcrum-pins; and 1?indicates a stop for limiting the movement of the lower arms of thelevers toward each other.

The plate is to be secured to the inside of the window-blind, with itsaperture opposite the aperture in the blind through which the boltpasses.

To secure the blinds after they are closed, the conical end of the boltis brought opposite the aperture in the blind and the bolt is forcedinto the aperture, forcing the levers apart until the reduced portionarrives at the circular recess formed by the levers, when the leversspring automatically together and secure the bolt without furthertrouble.

I am aware that a plate carrying upon itself a tube for insertion intothe shutter, and also a guide to confine the motion of twospringcatches, which take over the head of the bolt and prevent itswithdrawal, have been used; but a key was necessary to open thespringcatch for the withdrawal, and the catches were fulcrumed to theshutter below the plate, and not to the plate, as are my levers andsprings. The above construction is shown in Patent No. 149,904 of April21, 1874:, and I make no claim herein to the same.

Having thus described my invention, What I claim, and desire to secureby Letters Patent, is-- In a shutter-fastener, the combination of thesupporting-plate, having an aperture for 2 eseuzse plate, constructedand operating substantially as herein set forth.

In testimony whereof I aff x my signature in presence of two witnesses.

ALLEN M. WALKER.

Witnesses:

J. T. ST WART, J AMES D. Ross.

